On February 5, 2024 Chugai Pharmaceutical Co., Ltd. (TOKYO: 4519) reported that it has obtained approval from the Ministry of Health, Labour and Welfare (MHLW) on February 2, 2024, for FoundationOne CDx Cancer Genomic Profile to be used as a companion diagnostic for Pfizer Japan Inc’s polyadenosine 5’ diphosphate ribose polymerase (PARP) inhibitor, TALZENNA capsules (generic name: talazoparib tosilate), which is approved for BRCA gene mutation-positive castration-resistant prostate cancer with distant metastases (Press release, Chugai, FEB 5, 2024, View Source;category= [SID1234639832]).

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"We are pleased that FoundationOne CDx Cancer Genomic Profile was approved as a companion diagnostic for talazoparib for BRCA gene mutation-positive castration-resistant prostate cancer with distant metastases," said Chugai’s President and CEO, Dr. Osamu Okuda. "Castration-resistant prostate cancer is considered an advanced cancer that is difficult to treat, and there is a high unmet medical need. By expanding companion diagnostics, we aim to increase the value of this test for smooth consideration of treatment plans, improve access for prostate cancer patients, and contribute to the advancement of cancer treatment."

This approval enables the detection of BRCA1/2 gene mutations using the FoundationOne CDx Cancer Genome Profile to assist of the decision to use talazoparib for BRCA gene mutation-positive castration-resistant prostate cancer with distant metastases. The efficacy and safety of combination therapy of talazoparib and enzalutamide* for BRCA gene mutation-positive castration-resistant prostate cancer with distant metastases was evaluated in the global phase III study TALAPRO-2. Pfizer Japan Inc. obtained approval from the MHLW on January 18th, 2024.

As a leading company in the field of oncology, Chugai is committed to realizing advanced personalized healthcare in oncology and contributing to patients through the expansion of Comprehensive Genome Profile.

* Enzalutamide is the generic name of Xtandi tablets, a prostate cancer treatment drug for which Astellas Pharma Inc. has manufacturing and marketing approval.

Approval information The underlined and bolded part has been newly added.

Intended uses or indications

The Product is used for comprehensive genomic profiling of tumor tissues in patients with solid cancers.
The Product is used for detecting gene mutations and other alterations to support the assessment of drug indications listed in the table below.
Alterations Cancer type Relevant drugs
Activated EGFR alterations Non-small cell lung cancer (NSCLC) afatinib dimaleate, erlotinib hydrochloride, gefitinib, osimertinib mesylate, dacomitinib hydrate
EGFR exon 20 T790M alterations osimertinib mesylate
ALK fusion genes alectinib hydrochloride, crizotinib, ceritinib, brigatinib
ROS1 fusion genes entrectinib
MET exon 14 skipping alterations capmatinib hydrochloride hydrate
BRAF V600E and V600K alterations Malignant melanoma dabrafenib mesylate, trametinib dimethyl sulfoxide, vemurafenib, encorafenib, binimetinib
ERBB2 copy number alterations (HER2 gene amplification positive) Breast cancer trastuzumab (genetical recombination)
KRAS/NRAS wild-type Colorectal cancer cetuximab (genetical recombination), panitumumab (genetical recombination)
Microsatellite instability high nivolumab (genetical recombination)
Microsatellite instability high Solid tumors pembrolizumab (genetical recombination)
Tumor mutational burden high pembrolizumab (genetical recombination)
NTRK1/2/3 fusion gene entrectinib, larotrectinib sulfate
BRCA1/2 alterations Ovarian cancer olaparib
BRCA1/2 alterations Prostate cancer olaparib, talazoparib tosilate
FGFR2 fusion genes Biliary tract cancer pemigatinib
About FoundationOne CDx Cancer Genomic Profile
Developed by Foundation Medicine Inc., FoundationOne CDx Cancer Genomic Profile is a next-generation sequencing based in vitro diagnostic device for the detection of substitutions, insertion and deletion alterations, and copy number alterations in 324 genes and select gene rearrangements, as well as genomic signatures including microsatellite instability (MSI) and tumor mutational burden (TMB) using DNA isolated from formalin-fixed, paraffin-embedded (FFPE) tumor tissue specimens. The program is available as a companion diagnostic for multiple molecular-targeted drugs approved in Japan.

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